恶性黑色素瘤的发生率和发生部位依种族不同而有差异,日本人比白人少,但是每年有增加趋势.日本人的黑色素瘤好发于足底、手掌、指(趾)甲下等末端部位或粘膜。这些黑色素瘤有其共同的临床和病理组织学特征,又称掌-足底-甲下-粘膜黑色素瘤。 The incidence and location of malignant melanoma vary by ethnicity. Japanese people are less likely than whites, but there is an increasing trend every year. Japanese melanoma occurs at the end of the foot, the palm, and the nail. Or mucous membranes. These melanomas have their common clinical and histopathological features, also known as palm-plantar-subungual-mucosal melanoma.